Hello,
In Ecwid, you can add your products in your
control panel and sell them through your storefronts. If you have some 3d-party products that you want to sell through Ecwid, you will need to create copies of those products in your Ecwid store and forward your customers to the corresponding product pages in your Ecwid catalog so that they will be able to add a product to the cart and proceed with the checkout using Ecwid widgets.
If the products provided by another source need to be separated from the regular ones in the storefront and need to have different settings (such as
shipping rates and
taxes), you can put them in a separate category and define specific settings for them in your control panel. It is also possible to have several storefronts and place different groups of products on different pages (or sites) using the technique described in this article:
http://kb.ecwid.com/w/page/27229589/...differentsites
If you need to connect your Ecwid store with 3d-party database somehow (for example, for order/inventory tracking), you can use Ecwid's APIs in your custom applications. Please refer to this article for the details:
http://kb.ecwid.com/w/page/25232810/API
If the mentioned features meet your requirements and you decide to upload those products to your Ecwid store, you can consider using of our CSV import feature, which will help you to upload the products quickly:
http://kb.ecwid.com/w/page/26373353/Import-Export
Please let us know if you have any questions.